Cassiopeia spherical balloon crash, May 9, 1913, Near Pillau
Cassiopeia spherical balloon accident on May 9, 1913 near Pillau, Germany with no fatalities.
- Date: May 9, 1913
- Aircraft: Cassiopeia spherical balloon
- Location: Near Pillau, Germany
- Fatalities: 0
The German army balloon Cassiopeia went missing near Pillau. The number of casualties is not stated.